Strip-handling apparatus

ABSTRACT

A cartridge is fixed to a frame and has an exit opening. A coil of strip contained in the cartridge has a leading end which is accessible from the outside of the cartridge and movable out of the same in a predetermined direction through the exit opening. A peeling member carried by the frame is pivotally movable through the exit opening into engagement with a predetermined point of the periphery of the coil. A belt drive has a plurality of rollers and a belt trained around the rollers. The rollers include a drive roller carried by the frame on a stationary axis and operable in a predetermined sense to move the belt in a predetermined direction, and a friction roller. A friction roller mounting is movably mounted in the frame and carries the friction roller and is operable to move the friction roller through the exit opening into engagement with the periphery of the coil at a point which in the direction in which the leading end is movable out of the exit opening precedes the point where the periphery of the coil is engageable by the peeling member. The belt has a belt course which is arranged to move away from the friction roller when the belt moves in the predetermined direction. The peeling member and the belt course define between them a passage arranged to receive the leading end of the strip as it moves out through the exit opening. A slider has the peeling member pivoted thereto and is movable from an initial position to a final position to move the peeling member into the cartridge. A pawl is carried by the slider and arranged to engage the peeling member and hold it clear of the periphery of the coil when said slider is in an intermediate position between the initial and final positions. A stop secured to the frame is arranged to be engaged by the pawl in the final position of the slider and thus to disengage the pawl from the peeling member. A spring acting between the peeling member and slider tends to urge the peeling member into engagement with the periphery of the coil when the slider is in its final position.

United States Patent Forch et al.

[ Apr. 18, 1972 [54] STRIP-HANDLING APPARATUS [72] Inventors: Friedrich Forch; Erwin Krob, both of Vienna, Austria [73] Assigneesi Karl Vockenhuber; Rairnund Hauser,

Vienna, Austria 22 Filed: Oct. 28, 1969 211 App]. No.: 871,833

Primary Examiner-Leonard D. Christian Attorney-Ernest G. Montague [57] ABSTRACT A cartridge is fixed to a frame and has an exit opening. A coil of strip contained in the cartridge has a leading end which is accessible from the outside of the cartridge and movable out of the same in a predetermined direction through the exit opening. A peeling member carried by the frame is pivotally movable through the exit opening into engagement with a predetermined point of the periphery of the coil. A belt drive has a plurality of rollers and a belt trained around the rollers. The rollers include a drive roller carried by the frame on a stationary axis and operable in a predetermined sense to move the belt in a predetermined direction, and a friction roller. A friction roller mounting is movably mounted in the frame and carries the friction roller and is operable to move the friction roller through the exit opening into engagement with the periphery of the coil at a point which in the direction in which the leading end is movable out of the exit opening precedes the point where the periphery of the coil is engageable by the peeling member. The belt has a belt course which is arranged to move away from the friction roller when the belt moves in the predetermined direction. The peeling member and the belt course define between them a passage arranged to receive the leading end of the strip as it moves out through the exit opening. A slider has the peeling member pivoted thereto and is movable from an initial position to a final position to move the peeling member into the cartridge. A pawl is carried by the slider and arranged to engage the peeling member and hold it clear of the periphery of the coil when said slider is in an intermediate position between the initial and final positions. A stop secured to the frame is arranged to be engaged by the pawl in the final position of the slider and thus to disengage the pawl from the peeling member. A spring acting between the peeling member and slider tends to urge the peeling member into engagement with the periphery of the coil when the slider is in its final position.

4 Claims, 5 Drawing Figures BJSSEJOZ' PATENTEDAPR 18 m2 SHEET 10F 2 FIG./

FIG la STRIP-HANDLING APPARATUS This invention relates to a device for withdrawing a strip from a coil which is disposed in a cartridge, particularly in a cinematographic camera or reproducing apparatus, which device comprises a peeling member, which is carried by the apparatus and during the withdrawal of the strip engages the periphery of the coil, particularly under a resilient force, and a strip-driving belt drive having at least two rollers, a first of said rollers being mounted on a fixed axis and arranged to drive the belt, a friction roller serving to withdraw the leading end of the strip and arranged to engage the periphery of the coil at a point which in the strip-withdrawing direction lies closely before the peeling member, said friction roller being adapted to drive the strip in its withdrawing direction, the peeling member and that course of the belt which moves away from the friction roller defining a passage, through which the strip is withdrawn, and the peeling member being mounted on a controlling slider or the like and being mounted thereon preferably by being pivoted on two different axes.

In such devices it is important that the passage defined by the peeling member and the strip drive has a uniform, narrow width throughout its length regardless of the diameter of the strip coil wound on the reel because passage portions having an increased width may result in an entanglement of the film. Proposals have already been made how this problem can be solved. It has been found, however, that some structurally desirable arrangements may involve difficulties which are due to the fact that the path of the peeling member intersects the path of the strip drive during the movement of the several parts. Due to this fact, these two parts cannot be moved to their operative position at the same time. On the other hand, an unduly large structural expenditure would be involved if separate actuating means were provided for each of these two parts.

It is an object of the invention to eliminate these disadvantages. The invention resides essentially in that the controlling slider or the like has secured to it a pawl or the like, which locks the peeling member in an intermediate position during the pivotal movement of the peeling member into the cartridge, and a stop is secured to the apparatus and engageable by the pawl in the end position of the controlling slider and arranged to disengage the pawl so that a spring which is anchored on the controlling slider causes the peeling member to continue its pivotal movement into engagement with the periphery of the strip coil. This arrangement will ensure that the peeling member is pivotally moved into the cartridge after the strip drive and thus results in a greater latitude of design.

Further details and advantages of the invention will become apparent from the following description of an embodiment which is shown diagrammatically and by way of example in the drawing.

FIG. 1 is a schematic view which shows a device according to the invention applied to a substandard film projector.

FIG. 1a is a top plan view showing part of that device.

FIGS. 2 to 4 are schematic views which show the device according to the invention in different positions.

A projector 1 has a surface, not shown, for engagement by film supply cartridges 2, 3 in various sizes. To withdrawthe leading end of the film from a film coil contained in a cartridge, a threading-out device 4, 5 is provided, which consists of a peeling member 4 and a roller set 5. A controlling slider 6 is provided, which serves to operate that threading-out device 4, 5 and which is manually operable by a sliding key 7. When this sliding key 7 is operated against the action of a spring 8, the slider 6 will be displaced to the right in FIG. 1. The controlling slider 6 is guided with the aid of slots 9, which receive pins 10.

The peeling member 4 is arranged before the controlling slider 6 and consists of a U-shaped part, which in its limb facing the controlling slider 6 has cam slots 11. Pins 12 extend through the slots 1 1. The peeling member 4 has also an extension 13, which under the action of a spring 14 bears on the right upper pin of the means for guiding the controlling slider 6. Another extension is provided with a detent pin 15,

which spans the space between the limbs of the peeling member. The controlling slider 6 carries at its lower end a pawl 16.

If the controlling slider 6 is displaced to the right from its position of rest, the spring 14 imparts a pivotal movement to the peeling member 4 until the detent pin 15 engages the pawl 16. As the displacement of the controlling slider 6 is continued, the peeling member 4 remains in its position (FIGS. 2, 3). Finally, an engaging surface 17 of the pawl 16 engages a stationary stop 18 so that the pawl 16 is lifted from the detent pin 15. Thereafter, the spring 14 imparts a pivotal movement to the peeling member 4 until its leading end engages a coil of film which is disposed in a cartridge 2 or 3 (FIG. 4).

The roller set 5 (FIG. 1) comprises a drive roller 19, which is secured to a drive shaft 20. The latter extends through one of the slots 9 of the controlling slider 6 and thus replaces one of the guide pins 10. Additional rollers 22, 23 are mounted on a plate 21, which is pivotally movable about the drive shaft 20. A common belt 24 is trained around all three rollers 19, 22, 23.

The means for driving the shaft 20 can be started as soon asthe peeling member 4 has reached one of the two positions shown in FIG. 4. To start said drive means, e.g., the controlling slider 6 may be displaced further to the right to a small extent to operate a clutch or the like for driving the shaft 20. The rotation of the shaft 20 causes the plate 21 to perform a pivotal movement in the counterclockwise sense in dependence on the torque until said plate also engages the film coil. The roller 22 has in this engaged position the function of a friction roller for driving the film coil and the plate 21, on which the roller 22 is mounted, constitutes a friction roller mounting. FIG. 4 shows the roller set S and the peeling member 4 in two positions represented by dash-dot and solid lines, respectively. It is clearly apparent that the passage for the leading end of the film, which passage is defined between the peeling member and the belt 24, has the same width in both positions. A comparison of the two positions indicates that the path of the tip of the peeling member 4 intersects the path of the belt 24. Hence, the invention ensures that there is a passage having a constant width for any coil diameter, the peeling member 4 enters the cartridges before the roller set 5, and a relatively small slot in the cartridges 2, 3 is sufficient to permit the peeling member 4 to enter one of these cartridges. All these advantages are afforded with relatively simple means.

When the threading-out operation has been completed, the roller set 5 generally drops back to its initial position under the action of gravity. If it fails to do so for any reason whatever, the plate 21 may have an extension 25, which is pivotally moved by a stop 26 of the controlling slider 6 so that the plate 21 returns to its position of rest (see FIGS. 1, 2, 3). The peeling member also returns to its position of rest (FIG. 1) as soon as the upper guide pin 10 strikes against the extension 13 of the peeling member 4 (FIG. 2).

It will be understood that a pivotal movement may be imparted to the plate 21 by other means. The pivotal movement of the plate 21 toward one of the film coils might be retarded by a pawl arrangement which is similar to that used for the peeling member 4. The drive of the shaft 20 is suitably also derived from the main motor of the projector by a clutch. Alternatively, a separate motor may be provided for this purpose. It will be understood that the controlling slider 6 may be used to perform numerous other functions, e.g., to lock the cartridge.

What is claimed is:

1. A strip-handling apparatus which comprises a frame,

a cartridge fixed to said frame and having an exit opening,

a coil of strip contained in said cartridge and having a leading end which is accessible from the outside of said cartridge and movable out of the same through said exit opening,

Human nntn a peeling member which is carried by said frame and movable through said exit opening into engagement with a predetermined point of the periphery of said coil,

' a belt drive having a plurality of rollers and a belt trained around said rollers,

said rollers including a drive roller carried by said frame on an axis and operable in a predetermined sense to move said belt in a predetermined direction, and a friction roller,

. a friction roller mounting movably mounted in said frame and carrying said friction roller and operable to move said friction roller through said exit opening into engagement with the periphery of said coil at a point which in the direction in which said leading end is movable out of said exit opening precedes the point where the periphery of said coil is engageable by said peeling member,

said belt having a belt course which is arrangedto move away from said friction roller when said belt moves in said predetermined direction,

said peeling member and said belt course defining between them a passage arranged to receive said leading end of said strip as it moves out through said exit opening,

a slider having said peeling member pivoted thereto and movable from an initial position to a final position to move said peeling member into saidcartridge,

said peeling member being movable relative to said slider,

a pawl means carried by said slider and arranged to engage said peeling member and hold it clear of the periphery of said coil when said slider is in an intermediate position between said initial and final positions,

a stop secured to said frame and arranged to be engaged by said pawl means in said final position of said slider and thus to disengage said pawl means from said peeling member, and

a spring acting between said peeling member and slider and tending to urge said peeling member into engagement with the periphery of said coil when said slider is in said final position. V

2. Strip-handling apparatus as set forth in claim 1, in which said frame is a frame of a motion picture camera.

3. Strip-handling apparatus as set'forth in claim 1, in which 5 said frame is a frame of a motion picture projector.

4. Strip-handling apparatus as set forth in claim 1, in which said peeling member is mounted on said slider for pivotal movement about two different axes.

II i i l 

1. A strip-handling apparatus which comprises a frame, a cartridge fixed to said frame and having an exit opening, a coil of strip contained in said cartridge and having a leading end which is accessible from the outside of said cartridge and movable out of the same through said exit opening, a peeling member which is carried by said frame and movable through said exit opening into engagement with a predetermined point of the periphery of said coil, a belt drive having a plurality of rollers and a belt trained around said rollers, said rollers including a drive roller carried by said frame on an axis and operable in a predetermined sense to move said belt in a predetermined direction, and a friction roller, a friction roller mounting movably mounted in said frame and carrying said friction roller and operable to move said friction roller through said exit opening into engagement with the periphery of said coil at a point which in the direction in which said leading end is movable out of said exit opening precedes the point where the periphery of said coil is engageable by said peeling member, said belt having a belt course which is arranged to move away from said friction roller when said belt moves in said predetermined direction, said peeling member and said belt course defining between them a passagE arranged to receive said leading end of said strip as it moves out through said exit opening, a slider having said peeling member pivoted thereto and movable from an initial position to a final position to move said peeling member into said cartridge, said peeling member being movable relative to said slider, a pawl means carried by said slider and arranged to engage said peeling member and hold it clear of the periphery of said coil when said slider is in an intermediate position between said initial and final positions, a stop secured to said frame and arranged to be engaged by said pawl means in said final position of said slider and thus to disengage said pawl means from said peeling member, and a spring acting between said peeling member and slider and tending to urge said peeling member into engagement with the periphery of said coil when said slider is in said final position.
 2. Strip-handling apparatus as set forth in claim 1, in which said frame is a frame of a motion picture camera.
 3. Strip-handling apparatus as set forth in claim 1, in which said frame is a frame of a motion picture projector.
 4. Strip-handling apparatus as set forth in claim 1, in which said peeling member is mounted on said slider for pivotal movement about two different axes. 